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Discard LSP publishDiagnostic when LS is not initialized (#3403)

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This is invalid according to the [LSP spec]:

> In addition the server is not allowed to send any requests
> or notifications to the client until it has responded with an
> InitializeResult, with the exception that during the initialize
> request the server is allowed to send the notifications
> window/showMessage, window/logMessage and telemetry/event as well
> as the window/showMessageRequest request to the client.

So we should discard the message when the language server is not
yet initialized. This can happen if the server sends
textDocument/publishDiagnostics before responding to the initialize
request. clojure-lsp appears to exhibit this behavior in the wild.

[LSP Spec]: https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#initialize
This commit is contained in:
Michael Davis 2022-08-31 03:47:18 -05:00 • committed by GitHub
parent 03f0ef93ac
commit 7547a961bb
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1 changed files with 6 additions and 1 deletions
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7
helix-term/src/application.rs
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@ -512,7 +512,12 @@ impl Application {
use helix_core::diagnostic::{Diagnostic, Range, Severity::*};
use lsp::DiagnosticSeverity;
let language_server = doc.language_server().unwrap();
let language_server = if let Some(language_server) = doc.language_server() {
language_server
} else {
log::warn!("Discarding diagnostic because language server is not initialized: {:?}", diagnostic);
return None;
};
// TODO: convert inside server
let start = if let Some(start) = lsp_pos_to_pos(